UNIVERSTI

Kebangsaan

$1.$A vessel's shell has an internal radius of $36".$ At the design temperature, the material's allowable stress is $15,000$ psi. The pressure on the shell is $158($static head is already included$).$ The joint efficiency is $1\mathrm{.}0.$

a$)$ Determine the minimum required thickness for the shell.

b$)$ If the above $36"$ measurement is the outside radius, determine the minimum required thickness for the shell.

c$)$ If the shell is spherical and thick, determine the minimum required thickness for the sphere.

$2.$A vertical vessel has an internal radius of $48".$ The material's allowable stress is $12,000$ psi. The MAWP of the vessel is $120$ psig. The welds are "double welded" and the nameplate mentions spot radiography. The top of this shell section is $4\text{'}$ from the top of the vessel, and the bottom of this shell section is $52\text{'}$ from the top of the vessel. Determine the required thickness.

$3.$A horizontal vessel has an outside diameter of $10\text{'}.$ The material's allowaple stress is $14,000$ psi. The MAWP of the vessel is $120$ psig. The welds are Type$-1$ and Full$-$RT was performed. Determine the minimum required thickness.

$4.$ The thickness of each part is $0\mathrm{.}500".$ The allowable stress of the material is $15,000.$ The joint efficiency is $1\mathrm{.}0$ and the inside diameter is $60".$ Calculate the maximum pressure for each part:

a$)2$:$1$ Ellipsoidal Head: $$ psi

b$)$ Torispherical Head: $$ psi

c$)$ Hemispherical Head: $$ psi

d$)$ Cylinder: $$ psi

e$)$ Sphere: $$ psi

State which shape is the best for containing pressure and which shape is the worst for containing pressure.